The news about Curiosity Rover's "greatest discovery" on Mars was revealed by online publication named MSNBC.website. Even though the article has been removed, it can be viewed via Google Webcache. According to the report, NASA's Mars rover found fish fossil on Martian surface, and the news has been confirmed by NASA scientists.

The report notes that the NASA scientists have "collected samples and stunning images," and they are feeling positive about the discovery. The discovery reportedly was made when a 2.5-inch-deep hole was drilled into Windjana. The website claims that the scientists found images of what appears to be "fossilized remains of a fish-like creature," and this discovery has led them to believe in the existence of life on Mars from "millions of years ago."